power jacks ema linear actuators · 2020. 9. 10. · those remain the defining characteristics of...

EMA LINEAR ACTUATORS

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Power Jacks has a proud engineering heritage dating from the earliest years of the 20th Century. A heritage that is about excellence: about visionary design, technical expertise, robust product manufacture and customer care.

Those remain the defining characteristics of Power Jacks today as we design and build screw jacks, bevel gearboxes, linear actuators and roller screws. In fact they’re more important than ever as we take our service delivery to you – the customer – to new levels of performance.

There’s even more to it than that, however. We harness our engineering knowledge and capabilities not only to create a diverse linear motion product portfolio, but also to engineer individual solutions: to create customised products that help you improve your business.

The best people, proven products, quality performance: a combination that sets us apart.

POWER THAT'S ELECTRIC.

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CONTENTS

EMA Features 6 - 7EMA Options 8 - 9Product Code 10-11Typical Applications 12General Performance 13Model-I with Emergency Overload Clutch 14Model-I with NO Emergency Overload Clutch 15Model-C with Emergency Overload Clutch 16Model-C with NO Emergency Overload Clutch 17Model-H with Emergency Overload Clutch 18Model-H with NO Emergency Overload Clutch 19EMA Motor Types 20EMA Motion Control 21 - 22End Fittings for Actuator Ram 23EMA Mountings 24Other Products 25

Notes:

• All information in this document is subject to change without notice

• All rights reserved by Power Jacks Limited. May not be copied in whole or in part

• ©Power Jacks Limited 1987, Aberdeenshire, Scotland, United Kingdom


OUR LINEAR ACTUATORS DELIVER POWERFUL, SMOOTH AND PRECISE LINEAR MOTION

EMAFeatures

Limit switches mount

on outer tube

• Mechanical

• Proximity

Ram available in plated

steel as standard or

stainless steelOuter tube made from

aluminium for reduced

weight. Also available

in plated steel or

stainless steel

Limit switch target

Ring/Cam

5 End Fittings as standard

• Threaded End

• Clevis End*

• Fork End*

• Top Plate*

• Rod End

Clutch option to limit load or

provide emergency protection

Ram sealed and

guided at end

* Zinc plated as standard stainless steel options available

Our EMA industrial linear actuator is designed for low to medium duty applications, with loads up to 10kN. It uses a precision spiroid gear set that delivers superior performance when compared to a similar size worm gear set.

Depending on the performance required, the gear set drives either a machine screw or ball screw to move the ram. And a wide range of options, including clutches and limit switches, are available to suit most applications.

Overview of EMA Linear Actuator Range

What is EMA Linear Actuator?EMA is an abbreviation for Electro Mechanical Actuator, which consists of either a trapezoidal or ball lead screw, driven by an electric motor through spiroid gearing. The screw converts the rotary motion into linear movement. As the screw rotates, the nut extends and retracts the ram, which is attached to the load.

The EMA Linear Actuator RangeThere are 3 standard EMA models, all available in a right-angle drive configuration.

• Intermittent duty model (I), incorporating a trapezoidal screw• Medium duty model (C), incorporating a ball screw• High speed & medium duty model (H), incorporating

a ball screw

Where the standard range does not meet the application specification, special actuators can be designed to meet customers’ specific requirements.

Dynamic Load Capacity and SpeedThe dynamic load capacity range is up to 10 kN. A defined range of linear speeds from 135 mm/minute to 5510 mm/minute is available. The speed range is achieved by using a combination of gearbox ratios, screw leads and standard motor speeds.

DrivesAs standard, the units are available with 240V/415V AC or 24V DC motors, with or without a brake. The type of motors required is dependent on the customer’s application. The motors are mounted to the actuator on a 63C Face Flange Mounting.

StrokeEach model can be provided with a stroke length up to the maximum shown in the Technical Charts. The stroke is defined by the customer. For a tensile load, greater maximum strokes can be accommodated, depending on the linear speed. Where the stroke required exceeds the maximum shown, or there is a high static load, please contact our Technical Sales Department.

07www.powerjacks.com

Standard Features• Choice of AC or DC motor drives• Choice of end fittings: clevis, fork

top plate, rod or threaded end• Trunnion Mounting• Limit Switches

Emergency Overload ClutchThe emergency overload clutch is a device, which is mounted on the actuator ram, which will slip when the torque to drive the load exceeds the limit set. If the load is axially locked, or if a torque greater than the clutch setting is required to move the load, the clutch will disengage the load from the ram and prevent the motor from overloading the actuator components. Please note that the clutch is an emergency device and should not be used for reversing the actuator direction.

Limit SwitchesLimit switches are fitted to provide end of stroke or ultimate over travel safety. They are mounted on the outer tube of the actuator

and are tripped by a collar on the ram. They are set at a fixed length defined by the customer (see dimensional page for details).Adjustable Limit Switches can be provided on request, consult Power Jacks.

Guiding the LoadSide loads on the actuator ram should be avoided by ensuring that the load is guided. The load guide mechanism should resist the torque developed at the ram by the screw mechanism. A guided ram can be supplied on request, which utilises a keyway in the inner ram, eliminates the need for torsional restraint and therefore allows flexibility in the choice of end fitting.

ConstructionAll units are constructed and finished to suit industrial operating conditions. The actuator gearbox and outer tube are painted aluminium or plated for protection and the ram is zinc plated steel. The actuator is sealed at the ram. Stainless steel options available on request.

2 Lead Screw options

• Machine Screw

• Ball Screw

Grease lubricated

gearbox and ram

Gearbox housing in

light-weight,

high-strength

aluminium

Compact and precision spiroid

gear set provides a high

tourque, smooth and quiet drive

Clevis pin bush

Integrated Clevis End for I&C

type gearbox housings

Electric Motor

3 - Phase AC

1 - Phase AC

DC

Servo

All available with or

without a brake

Corrosion Protection

To suit all economic needs

• Standard industrial paint finish

• Arduous environment paint finish

• Customer specified paint

• Plated finish (not including motor)

• Bellows boot for ram

• Stainless steel options available

Motor adapter integrated

into gearbox housing


EMAOptions

Machine Screw

Ball Screw

Model C, I

Rear Clevis at

90 degrees

Model H

Rear Clevis can

be mounted at 90

degrees increments

Model H

Rear Housing

Trunnion Feet

Trunnion Compact

Electromechanical

Limit Switch

Emergency

Overload Clutch

Inductive Proximity

Sensors

Top Plate

Clevis End

Fork End

Rod End

Bellows Boot


Electric Motor 3 Phase

AC with Brake

Electric Motor

3 Phase AC

Electric Motor

1 Phase AC

Electric Motor 1

Phase AC with Brake

Electric Motor

24V DC

Incremental / absolute encoders

(fitted to motor or actuator gearbox)

Model C, I

Standard Rear

Clevis

Model H

Rear Clevis can

be mounted at 90

degrees increments

Stainless steel options available on request.


EMAProduct Code

EA000AR-0135-0300-FD00-E100L10EMA Linear Actuator, Model-I, Standard Design, Right angled motor drive, 135mm/min linear speed, 300mm stroke, fork end on ram, clevis at 90 degrees on gearbox, electric motor 415VAC 3-Phase 50Hz, No Brake, No Clutch, 2 end of stroke fixed mechanical limit switches, limit switch position-1 (standard), Standard paint lubrication & seals.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

E A 0 0 0 A R - 0 1 3 5 - 0 3 0 0 - F D 0 0 - E 1 0 0 L 1 0

GROUP-1 - Linear Actuator Definition

GROUP-2 - Linear Actuator Features

GROUP-3 - Accessories

9-12 - Linear Speed (mm/min)XXXX 0 - 9,999 mm/min

14-17 - Stroke (mm) #1

0000 0-9999

2-5 - Model / SizeA000 Model-I

A001 Model-C

A002 Model-H

19 - Ram End TypeE Threaded End

C Clevis End

T Top Plate

F Fork End

R Rod End

21 - Ram Feature - 10 None

A Zero-Backlash (Anti-Backlash for Machine Screws)

K Anti-Rotation (Keyed) Ram - Low Duty #3

R Anti-Rotation (Low Duty) & Zero-Backlash Ram

22 - Ram Feature - 20 None

1 Bellows Boot - Fabric

2 Bellows Boot - Rubber

A Stainless Steel Ram #4

B Stainless Steel Ram & Bellows Boot - Fabric #4

C Stainless Steel Ram & Bellows Boot - Rubber #4

20 - Gearbox MountingC Rear Clevis

D Rear Clevis 90deg

T Trunnion Mount Standard #2

U T + Trunnion Feet #2

X Trunnion Mount 90deg #2

Y X + Trunnion Feet #2

7 - Drive / Motor Orientation (Relative to Ram)R Right Angled

6 - Actuator Design TypeA Standard Design

8 - Character Space

18 - Character Space



GROUP-1 - Linear Actuator Definition

GROUP-2 - Linear Actuator Features

1 - Linear Actuator SeriesE EMA Series


EMAProduct Code

25 - Motor Power Supply0 None - No Motor

1 415VAC 3-Phase, 50/60Hz Induction Motor (Standard)

2 220VAC 1-Phase, 50/60Hz Induction Motor

3 24VDC Permanent Magnet

4 AC Servo Motor - 3-Phase, AC

5 AC Servo Motor - 1-Phase, AC

6 DC Servo Motor

27 - Motion Feedback0 None

A Encoder - Absolute - Motor Mounted

B Encoder - Absolute - Gearbox Mounted

C Encoder - Incremental - Motor Mounted

D Encoder - Incremental - Gearbox Mounted

E Resolver - Motor Mounted #5

29 - Limit Switch Position #8

0 No Limit Switches

1 Limit Switch Position 1 (Standard)

2 Limit Switch Position 2



24 - Drive TypeE Electric Motor (Standard)

F Electric Motor and auxiliary shaft on gearbox

G Electric Motor with auxiliary shaft

H Hand Wheel

J Electric Motor & Hand Wheel

M No Motor - Just Motor Mount, B14

N No Motor - Just Motor Mount, B5

S No Motor Fittings - solid shaft input - single ended

T No Motor Fittings - solid shaft input - double ended

26 - Brake & Clutch0 No Brake, No Clutch

B Brake

C Clutch

D Brake & Clutch

28 - Limit Switches0 No Limit Switches

L Mechanical Limit switches - Fixed (2 EOS) #6

M Mechanical Limit switches - Adjustable (2 EOS) #6 #7

P Proximity Sensors - Fixed (2 EOS) #6

Q Proximity Sensors - Adjustable (2 EOS) #6 #7

30 - Paint, Lubricant, Seals #9 #10

0 Standard Paint, Lubricant & Seals G Standard Primer, Lubricant & Seals

1 Standard Paint & Food Grade Lubricant & Standard Seals H Standard Primer & Food Grade Lubricant & Standard Seals

2 Standard Paint, Nuclear Grade Lubricant & Seals I Standard Primer, Nuclear Grade Lubricant & Seals

3 Standard Paint, High Temperature Lubricant & Seals J Standard Primer, High Temperature Lubricant & Seals

4 Standard Paint, Low Temperature Lubricant & Seals K Standard Primer, Low Temperature Lubricant & Seals

5 Standard Paint, Biodegradeable Lubricant & Standard Seals L Standard Primer, Biodegradeable Lubricant & Standard Seals

A No Paint, Standard Lubricant & Seals M Epoxy Paint, Standard Lubricant & Seals

B No Paint & Food Grade Lubricant & Standard Seals N Epoxy Paint & Food Grade Lubricant & Standard Seals

C No Paint, Nuclear Grade Lubricant & Seals P Epoxy Paint, Nuclear Grade Lubricant & Seals

D No Paint, High Temperature Lubricant & Seals R Epoxy Paint, High Temperature Lubricant & Seals

E No Paint, Low Temperature Lubricant & Seals S Epoxy Paint, Low Temperature Lubricant & Seals

F No Paint, Biodegradeable Lubricant & Standard Seals T Epoxy Paint, Biodegradeable Lubricant & Standard Seals

GROUP-3 - Accessories

Notes: #1 Limited to 2000mm for EMA Actuators. #2 Trunnion mount distance / location on ram available as set position as standard for type of actuator, otherwise special design.#3 Low Duty Anti-Rotation - Keyed Ram (sliding guide) #4 Stainless Steel Ram - inner tube and end fitting all stainless steel.#5 Servo motor only#6 EOS = End Of Stroke#7 Adjustable to set end of stroke limits at each end by +/- 5mm.#8 Limit Switch radial position around circumference of actuator ram. 4 standard positions at 90 degree intervals (approx).#9 Power Jacks defined paint.#10 Power Jacks defined lubricant.


EMATypical Applications

Tilt/Pivot

EMA Linear Actuators can be used to tilt objects, fixed at one end, up to 180° from their starting positions. The extension and retraction of the actuator causes the object to pivot about its stationary end.

Lift/Lower

EMA Linear actuators can handle any lifting and lowering application up to 10kN. As the translating tube of the actuator extends and retracts, the object that the actuator is attached to is raised and lowered at a constant speed.

Position

When an application requires periodic adjustment to the position of an object or objects, EMA linear actuators provide the solution. The motion of the actuator allows the operator to position an object by simply pushing a button.

Roll/Slide

When it is necessary to roll or slide an object or a mechanical assembly into position, an EMA linear actuator is the answer. The movement of the actuator causes the clamping, rolling or sliding of the desired object.

Open/Close

An EMA linear actuator mounted on a door, gate or valve allows opening and closing operations on either a timed, or on-demand basis. As the actuator retracts the gate is opened at a steady rate; the extension of the actuator returns the gate to a closedposition.

Tension

EMA linear actuators offer a perfect solution for applications in which tension on a conveyor or webb must be maintained and adjusted. An actuator mounted on a frame or roller extends and retracts to control the tension in the system.

Lock/Unlock

For moving a locking device such as a pin in and out of retaining slot, EMA linear actuators provides the perfect solution. The motion of the actuator allows the operator to lock and unlock the device smoothly and safely by the touch of a button. Extend and retract limit switches on the actuator can be used as lock/unlock signals for a machines control system.


EMAGeneral Performance

MODEL I (INTERMITTENT DUTY)

Dynamic Capacity (kN) 10 5 5 5 2.5

Linear Speed (mm/min) 135 200 270 410 820Motor Power (kW) 0.18 0.18 0.18 0.18 0.18

Motor Frame Size (IEC) 71 63 71 63 63

Motor Poles 6 4 6 2 2

Max Stroke - Compression (mm) 750 750 750 750 750

Max Stroke - Tension (mm)* 2000 2000 2000 2000 2000

Weight - no stroke (kg) 9

Weight - per 100mm stroke (kg) 0.69

Ambient OperatingTemperature (°C)**

-10°C to +50°C

Duty Cycle Rating*** Up to 5 cycles per hour, 50 cycles per day. Up to 25% operating time per hour.

MODEL C (MEDIUM DUTY)









Ambient Operating Temperature (°C)**

-10°C to +50°C


MODEL H (HIGH SPEED & MEDIUM DUTY)

Dynamic Capacity (kN) 10 10 10 5 5Linear Speed (mm/min) 900 1375 2755 1805 5510Motor Power (kW) 0.25 0.37 0.55 0.25 0.55Motor Frame Size (IEC) 71 71 71 71 71Motor Poles 6 2 2 6 2Max Stroke - Compression (mm) 900 900 900 1250 1250




Ambient Operating Temperature (°C)**

-10°C to +50°C


Notes:

* Longer strokes available on request.

** Please consult Power Jacks to discuss hostile or hazardous

operating environments.

*** 1 Cycle = actuator moved to fully extended position

then fully retracted position.

General Performance


13.1013.00

R16

50.80

44

60STROKE + 2

STROKE + 187 WITH SWITCHESSTROKE + 175 WITHOUT SWITCHES

14

45

M123851

58

125 3

247

WIT

H B

RA

KE

190

WIT

HO

UT

BR

AK

E

40

16

RETRACTED SWITCHEXTENDED SWITCH

15.3

19.0018.90

37104 5

30

30°

EMAModel-I with Emergency Overload Clutch

Related Accessories

End Fittings

Encoders

Trunnion Mounts

Anti-Corrosion

MODEL I (INTERMITTENT DUTY)Dynamic Capacity (kN) 10 5 5 5 2.5








Ambient Operating Temperature (°C)** -10°C to +50°C

Duty Cycle Rating Up to 5 cycles per hour, 50 cycles per day. Up to 25% operating time per hour.

Note: * Longer strokes available on request, ** Consult Power Jacks to discuss hostile or hazardous environments.

MOTOR TYPE

ITEM 3 PHASE AC 1 PHASE AC DC

Voltage 220 - 240/380 - 415VAC 220 - 240 VAC 24VDC

Motor Design Induction Single or Double Capacitor Designs

Permanent Magnet

Frame Type IEC, 63C Face IEC, 63C Face IEC, 63C Face

Enclosure (std) IP54 IP54 IP54

MOTOR OPTIONS

Brake Type 3ph AC, 1ph AC or DC 1ph AC or DC DC

Enclosure IP55, 56, 65 IP55 IP55

Encoder Available Available Available

Forced Ventilation Available - Available

Other Inverter Rated - 12,48 VDC

Mounting Options

Control Options

DEVICE OPTION 1 OPTION 2

Limit Switches Electro-mechanical Inductive proximity

Clutch Friction Clutch on Ram -

Encoder Type Incremental Absolute

General Performance

Motor Types and Options

Drives

Limit Switch

Clutch

FITTING

RAM END GEARBOX END

Clevis Y Y

Fork Y N

Threaded Y N

Top Plate Y N

Trunnion N Y

Rod End Y N

Bellow Boot

Actuator shown with IEC 63, 3-Phase AC Motor. For 71 frame size motor refer to Model-H.

57


Related Accessories

End Fittings

Encoders

Trunnion Mounts

Anti-Corrosion

13.1013.00

R 16

50.80

44

60STROKE + 2

STROKE + 165 WITH SWITCHESSTROKE + 149.5 WITHOUT SWITCHES

45

51

M1235

14

125 3

5824

7 W

ITH

BRA

KE19

0 W

ITH

OU

T BR

AKE

15

16


15.3

19.0018.90

37104 5

30

30°

EMAModel-I with NO Emergency Overload Clutch

MOTOR TYPE




Permanent Magnet



MOTOR OPTIONS






Mounting Options

Control Options






Drives

Limit Switch

Clutch

FITTING

RAM END GEARBOX END

Clevis Y Y

Fork Y N

Threaded Y N

Top Plate Y N

Trunnion N Y

Rod End Y N

MODEL I (INTERMITTENT DUTY)Dynamic Capacity (kN) 10 5 5 5 2.5











General Performance

Bellow Boot


57


EMAModel-C with Emergency Overload Clutch

44

70 50.80

R16

13.1013.00

4558

STROKE + 8


M12385076

14

125 3

247

WIT

H B

RA

KE

190

WIT

HO

UT

BR

AK

E

47

16


15.3

19.0018.90

37114 5

30

30°

Related Accessories

End Fittings

Encoders

Trunnion Mounts

Anti-Corrosion

MOTOR TYPE




Permanent Magnet



MOTOR OPTIONS






Mounting Options

Control Options






Drives

Limit Switch

Clutch

FITTING

RAM END GEARBOX END

Clevis Y Y

Fork Y N

Threaded Y N

Top Plate Y N

Trunnion N Y

Rod End Y N













General Performance

Bellow Boot


57


EMAModel-C with NO Emergency Overload Clutch

44

70 50.80

R 16

13.1013.00

4558

STROKE + 8


5076

M12

14

125 3

247

WIT

H B

RAKE

190

WIT

HO

UT

BRA

KE

19

16


15.3

19.0018.90

37114 5

3030°

Related Accessories

End Fittings

Encoders

Trunnion Mounts

Anti-Corrosion

MOTOR TYPE




Permanent Magnet



MOTOR OPTIONS






Mounting Options

Control Options






Drives

Limit Switch

Clutch

FITTING

RAM END GEARBOX END

Clevis Y Y

Fork Y N

Threaded Y N

Top Plate Y N

Trunnion N Y

Rod End Y N













General Performance

Bellow Boot


57


EMAModel-H with Emergency Overload Clutch

16

78

94 80STROKE + 8

5783

R20

20.02120.000

270

WIT

H B

RA

KE

215

WIT

HO

UT

BR

AK

E

140 3


76

M2055

25 61


30

24.00023.980

55

25

114 5

45°

Related Accessories

End Fittings

Encoders

Trunnion Mounts

Anti-Corrosion

MOTOR TYPE




Permanent Magnet



MOTOR OPTIONS






Mounting Options

Control Options






Drives

Limit Switch

Clutch

FITTING

RAM END GEARBOX END

Clevis Y Y

Fork Y N

Threaded Y N

Top Plate Y N

Trunnion N Y

Rod End Y N


Dynamic Capacity (kN) 10 10 10 5 5











General Performance

Bellow Boot

Actuator shown with IEC 71, 3-Phase AC Motor.

280


EMAModel-H with NO Emergency Overload Clutch

76

78

94 80STROKE + 8

5783

R20

20.02120.000

270

WIT

H B

RA

KE

215

WIT

HO

UT

BR

AK

E

140 3


M2050

25 18

16


30

24.00023.980

55

25

114 5

45°

Related Accessories

End Fittings

Encoders

Trunnion Mounts

Anti-Corrosion

MOTOR TYPE




Permanent Magnet



MOTOR OPTIONS






Mounting Options

Control Options






Drives

Limit Switch

Clutch

FITTING

RAM END GEARBOX END

Clevis Y Y

Fork Y N

Threaded Y N

Top Plate Y N

Trunnion N Y

Rod End Y N


Dynamic Capacity (kN) 10 10 10 5 5











General Performance

Bellow Boot

Actuator shown with IEC 71, 3-Phase AC Motor.

280

25


Standard 3-phaseKey Features3 Phase, 50 Hz / 60Hz220-240/380-415VAC B14 Face Mounting2-Pole (3000 rpm), 4-Pole (1500 rpm), 6-Pole (1000 rpm)IEC Frame Sizes to 63-71

Standard 3-phase with brakeKey Features3 Phase, 50 Hz / 60Hz220-240/380-415VACB14 Face Mounting2-Pole (3000 rpm), 4-Pole (1500 rpm), 6-Pole (1000 rpm)IEC Frame Sizes 63 to 71High torque DC brake rectifier: 230VAC, 50/60Hz (others on request)

BenefitsHigh efficiency – low running costsLow noise levelsHigh power factors• High torque with smooth acceleration

and low current• Multi-mount versatility for mounting

arrangement and terminal box position • Aluminium construction for light

weight and corrosion resistance• Four position cable entry

EMAMotor Types

MOTOR TYPE

ITEM 3 PHASE 1 PHASE DC



Permanent Magnet

Frame Type IEC (NEMA on request) IEC (NEMA on request) IEC (NEMA on request)


Brake 3ph AC, 1ph AC or DC 1ph AC or DC DC





3-Phase Braked Motor Wiring Diagram(Example-always check for exact motor used)

For brake motors with dc brake required at 230/400V 50Hz, the rectifier is directly connected to the motor terminal block as follows.

If using an inverter (frequency converter) then the brake must use a separate power supply to the rectifier.

RECTIFIER

REDBRAKE BLACK

Max Voltage

W2

U1 V1 W1

U2 V2

Star connection

BLACK

BRAKE

RED

RECTIFIER

V1U1 W1

V2U2W2

Min Voltage

Delta connection

V2U2

L3

W1V1

L1

W2

U1

L2

V1

U1

W1

Star connection

V1W1

U1

L2 L3L1

U2

V1

W2

U1

V2

W1

Delta connection

3-Phase Motor Wiring Diagram(Example-always check for exact motor used)

As standard, the units are available with 240V/415VAC 3-phase or 240VAC 1-phase or 24VDC motors, with or without a brake. The type of motors required is dependent on the customer's application. The motors are mounted to the actuator on an IEC 63C B14 Face Mounting.

Wiring Diagram

AUXILIARY

Double Capacitor

Single Capacitor

N

L

AUXILIARY

MA

IN

SExx

STARTINGCAPACITOR

RUNNINGCAPACITOR

RUNNING CAPACITOR

MA

IN

L

N

1-Phase Motor Wiring Diagram(Example-always check for exact motor used)


Standard EMA Actuator Limit Switch

Our range of motion control devices allows you to safe guard the operation of you actuator system and ensures it operates within the specified parameters.

Standard Limit Switches• Electro-Mechanical Switches• Proximity Sensors (Inductive)• Safety Rated Limit Switches• Compact reduced height designs• Threaded Barrel Mounting• Flying cable or plug-in connector options• Enclosures up to IP65 - IP67 available

Non Standard Limit Switches• Other limit switches can be supplied to suit most applications.• Different sizes, shape design and enclosure electro-mechanical

limit switches• Capacitive proximity sensor• Bolt on Limit Switches• Hazardous Area Rated electro-mechanical limit switch• High or low temperature rated• Enclosures up to IP68 available For further details, consult Power Jacks

EMAMotion Control

Housing Metal, compact housing, totally enclosed and sealed

Pre-cabled 2m PVC cable 5 x 0.75mm2 (other cable lengths available on request)

Switch type Single pole, 1 change-over, snap action

Max actuation speed 0.5 m/s

Mechanical durability 10 million operating cycles

Operation -25°C +77°C

Storage -40°C +70°C

Product conformity IEC947-5-1

Enclosure IP67

Operating characteristics

AC - 15; B300 (UE = 240V, le = 1.5A)

DC - 13; R300 (UE = 240V, le = 0.1A)

Insulation voltage Ui = 300V

Electro-Mechanical Switch Specifications

View AShowing Limit

Switches Position 1

Position - 1Standard

Position - 2

Position - 3

Position - 4

View A

Alternative Limit Switch Mounting Orientations

A

Electro-Mechanical Limit Switch

Proximity Sensor

Motor Axis

Actuator Ram

Notes:

• As standard 2 limit switches are mounted for end of travel positions. These

switches are mounted in the same position radially on the actuators ram.

• More than 2 limit switches can be installed and limit switches can be

individually mounted at different radial positions.

• Alternative switch mounting positions along the actuators ram are available

on request.


Absolute Encoders • Hollow or Solid shaft designs• Multi-Turn• SSI, 25-Bit, RS422• Configurable interface• Resolution up to 8192 steps x 8192

revolutions• Enclosure Up to IP66 as standard

Other designs available on request

Incremental Encoders • Hollow or Solid shaft designs• Multi-Turn• Signal lines from 1 to 8192• RS422 or Push-pull output drivers• Enclosure Up to IP66 as standard

Other designs available on request

EMAMotion Control

Absolute

Incremental

Absolute

Incremental

Encoders are mounted to an EMA Actuator either on the back of an electric motor (under cowling) or on the actuators gearbox opposite the motor.


A

G

B

C

F

D

EJ

H

K

CB

C

DE

F

A

J

L

K

G

H

D

E

B

H

F

A

GC

= =

C

D

AB

G

H

FE

I

EMAEnd Fittings For Actuator Ram

MODEL I C H

ØA Ø80 Ø80 Ø100

ØB Ø30 Ø30 Ø40

C 24 24 31.5

D 10 10 12

ØE Ø11 Ø11 Ø13.5

ØF (PCD) Ø55 Ø55 Ø70

G 8 8 10

H M6 x 1 M6 x 1 M8 x 1.25

I M12 x 1.75 M12 x 1.75 M20 x 2.5

Weight (kg) 0.43 0.43 0.79

PCD = Pitch Circle Diameter.

Top Plate

Clevis End

Fork

Rod End A

G

B

C

F

D

EJ

H

K

CB

C

DE

F

A

J

L

K

G

H

D

E

B

H

F

A

GC

= =

C

D

AB

G

H

FE

I

A

G

B

C

F

D

EJ

H

K

CB

C

DE

F

A

J

L

K

G

H

D

E

B

H

F

A

GC

= =

C

D

AB

G

H

FE

I

A

G

B

C

F

D

EJ

H

K

CB

C

DE

F

A

J

L

K

G

H

D

E

B

H

F

A

GC

= =

C

D

AB

G

H

FE

I

MODEL I C H

ØA Ø13 Ø13 Ø20

B 25 25 35

C 19 19 30

D 39 39 65

E 26 26 41

F M12 x 1.75 M12 x 1.75 M20 x 2.516 Deep 16 Deep 27 Deep

G M5 x 0.8 M5 x 0.8 M6 x 1

H 15 15 15

Weight (kg) 0.2 0.2 0.5

MODEL I C H

ØA Ø12 Ø12 Ø20

B 12 12 20

C 24 24 40

D 48 48 80

E 24 24 40

F 18 18 30

G 62 62 105

H M12 x 1.75 M12 x 1.75 M20 x 2.5

ØJ 20 20 34

K M6 x 1 M6 x 1 M8 x 1.25

L 10 10 10

Weight (kg) 0.12 0.12 0.55

MODEL I C H

A 50 50 77

ØB 12 12 20

C 18 18 27

ØD 34 34 53

E M12 x 1.75 M12 x 1.75 M20 x 1.5

F 23 23 40

ØG 22 22 35

H 10 10 16

J 8 8 13

K 19 19 32

Weight (kg) 0.096 0.096 0.35

Note: Lead screw threaded end made to suit rod end.


X

Mounting

There are two possible ways of mounting the EMA actuator at the gearbox end. By means of bearing journals for trunnion mounting or clevis mount.

Special mounting arrangements available on request e.g. flange on outer tube of ram, or clamp point on ram.

The Ram

A threaded end is standard on all models.Attachments are threaded on to the end of the ram and locked in place.The actuator can then be attached to the customers structure by a pinned or bolted connection depending on chosen model.

Rear Clevis

Mount the actuator by attaching the desired bracket and pin to the clevis end. Verify that the ram attachment is aligned throughout the actuator stroke before connecting the ram. The ram attachment will either be pinned or bolted in place depending on chosen model.

Trunnion Mount

Mount the actuator by attaching the desired bearings (or mounting feet) to the trunnion pins. Verify that the ram attachment is aligned throughout the actuator stroke before connecting the ram.

Trunnion Mount Note:The position of mounting versions 3 and 4 is variable and should be specified by the customer at the time of ordering. (Dimension X). Also refer product code - "Trunnion Mounting Distance"

Mounting positions 5 and 6 are the same as 3 and 4 except they include trunnion feet.

EMAMountings

MODEL I C H

ØS 11.99 14.99 14.9911.96 14.96 14.96

T 70 100 100

U 110 140 140

X (minimum) 100 100 140Minimum Stroke 100 100 100

Important Note:

Side loads on the actuator ram should be avoided by ensuring that the load is

guided. The load guide mechanism should resist the torque developed at the

ram by the screw mechanism. A guided ram can be supplied on request, which

utilises a keyway in the inner ram, eliminates the need for torsional restraint

and therefore allows flexibility in the choice of end fitting. The desired mounting

orientation will be determined when placing the order; this orientation must be

maintained at installation.

Rear ClevisVersion 1

TrunnionVersion 3

Threaded End

Actuator shown with trunnion mount version-3 and rear clevis version-1.

Important Note:

Always ensure that clevis holes align correctly and that they allow for the correct

angle of pivoting for the application before operating the actuator.


Single Face Screw Jacks

• Metric Machine Screw Jacks 5kN to 2000kN• Metric Ball Screw Jacks 10kN to 500kN• Metric Stainless Steel Screw Jacks 10kN to 300kN• Imperial (inch) Machine Screw Jacks 1/4Ton to 250Ton• Imperial (inch) Ball Screw Jacks 1/2Ton to 50Ton• Imperial (inch) Stainless Steel Screw Jacks 2Ton to 100Ton• Special Designs Available Up To 3500kN

EMA Linear Actuators

• Machine Screw & Ball Screw• Low load, Medium Duty, High Speed• Dynamic Load Ratings up to 10kN• Linear Speeds up to 5500 mm/min• 3-phase AC, 1-phase AC, and DC types• Special Designs Available

Rolaram Linear Actuators

• Ball Screw & Roller Screw• High load, High Duty, High Speed• Very High Accuracy• Dynamic Load Ratings up to 400kN• Linear Speeds up to 7000 mm/min• 3-phase AC, 1-phase AC, and DC types• True continuous duty / cycling actuator designs available• Special Designs Available

Spiracon Roller Screws

• High Dynamic Loads up to 1200kN• High Efficiency• High Positional Accuracy• Long Life• Low Maintenance• Low Noise• Robust Design for Harsh Environments• Special Designs Available

Neeter Drive Bevel Gearboxes

• 2-way, 3-way and 4-way Designs• Solid Shaft & Hollow Shaft• Motor Adaptors• Gear Ratios 1:1, 1.5:1, 2:1, 3:1 and 4:1• Torque Ratings up to 3000Nm• Special Gear Ratios and Designs Available

Power JacksOther Products

All information in this document is subject to change without notice. All rights reserved by Power Jacks Limited. May not be copied in whole or in part. ©Power Jacks Limited 2020, Aberdeenshire, Scotland, United Kingdom.

PJEMAB-EN-01f

www.powerjacks.com [email protected]

Power Jacks specialises in the design and manufacture of precision linear actuation, positioning and lifting equipment.Our products are supplied globally across many sectors including Industrial Automation, Energy, Transport, Defence and Civil.

Power Jacks LtdKingshill Commercial ParkProspect Road, WesthillAberdeenshire AB32 6FPScotland (UK)Tel: +44 (0)1224 968968

power jacks ema linear actuators · 2020. 9. 10. · those remain the defining characteristics of...

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